Condensed Consolidated Statements Of Cash Flows (USD $)	6 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Condensed Consolidated Statements Of Cash Flows [Abstract]
Net loss	$ (6,326,000)	$ (3,978,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	1,421,000	430,000
Stock issued under severance agreements	825,000	0
Stock issued to investors to amend subscription agreements	285,000	0
Warrant penalty	23,000	0
Gain on extinguishment of debt	(727,000)	0
Amortization of stock issued for services	636,000	24,000
Troubled debt restructuring loss	0	25,000
Depreciation and amortization	140,000	158,000
Amortization of deferred financing costs	0	215,000
Change in fair value of derivative liability	59,000	(240,000)
Amortization of debt discount	0	371,000
Changes in operating assets and liabilities:
Accounts receivable	9,000	5,000
Inventories	(64,000)	25,000
Prepaid expenses	(16,000)	23,000
Accounts payable and accrued liabilities	(275,000)	234,000
Deferred rent	(3,000)	(1,000)
Net cash used in operating activities	(4,013,000)	(2,709,000)
Investing activities
Investment in patents	(61,000)	(131,000)
Purchases of property, plant and equipment	(21,000)	(11,000)
Net cash used in investing activities	(82,000)	(142,000)
Financing activities
Net proceeds from the sale of common stock	4,664,000	4,227,000
Net proceeds from the exercise of warrants	163,000	0
Payment of Bridge Loan	0	(1,333,000)
Payment on note payable	(528,000)	0
Net cash provided by financing activities	4,299,000	2,894,000
Net increase in cash and cash equivalents	204,000	43,000
Cash and cash equivalents at beginning of period	32,000	877,000
Cash and cash equivalents at end of period	236,000	920,000
Supplemental disclosure of cash flow information
Cash paid for taxes	4,000	0
Supplemental disclosure of non-cash investing and financing activities
Common stock issued for prepaid services	175,000	0
Common stock issued in connection with financing	283,000	0
Settlement of warrant liability	$ (56,000)	$ 0